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... here is a challenge to those who like to make predictions.
What kind of equipotential lines would you expect for the
silver strip painted on a carbon-impregnated paper if the
shape of the strip was an uncurling flat spiral. Suppose the
length is 100 cm, the DOP between the terminals is 1 V, the
uniformly distributed resistance of the strip is 1 ohm.cm and
the angle is 1800 degrees (5 round trips from the grounded
terminal at the center to the positive terminal at outer end).
Draw equipotential lines for U=0.5 V and U=0.25 V. Assume that
the resistance of the carbon paper, (for example ohms/cm^2) is
1000 times larger than that of the silver layer. Ludwik
Kowalski